Temporary grate.



No. 837,377. v PATENTBD 1130.4, 1906. T. BENNETT.

TEMPORARY GRATE.

APPLICATION FILED 0I. 13 1905.

O 2. F -O, J

A THOMAS BENNETT, OFTORONTO, ONTARIO, CANADA.

ETEMPORARY GRATE.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed October 13, 1905. $erial No. 282,669.

To all whom it may concern:

Be it known that I, THOMAS BENNETT, sheet-metal worker, a subject of theKing of Great Britain, residing in the city of Toronto, in the county ofYork, in the Province of Ontario, Canada, have invented certain new anduseful Improvements in Temporary Grates, of which the following is aspecification.

My invention relates to improvements in temporary grates; and the objectof my invention is to design a grate, chiefly for summer use, that maybe used in connection with wood or coal stoves, whereon a fire may bekindled in order to have a temporary, but hot fire, the said grate beingstamped or formed from sheet metal and braced so that it will not bewarped through the action of different temperatures.

' Another object is to construct my grate so that the bracin orstiffening means will be as near as possible kept at a lower temperaturethan the major portion of the grate while it is in use and it consists,essentially, of a member formed or stamped out of sheet metal so as tobe given a substantially concavo-convex shape or form and provided witha plurality of slots or holes to permit of the necesssary draft, andfurther provided with strengthening or bracing ribs stamped upwardtherein from the lower side and' extending from side to side of saidgrate in conformity with its shape and means whereby same is supportedin the firebox.

Figure 1 is a side elevation of an ordinary cook-stove, the fire-boxbeing in section, showing my temporary grate, also in section, supportedtherein. Fig. '2 is a general perspective view of my preferred form ofgrate; and Fig. 3 is a longitudinal section on the line a b, Fig. 2.

In the drawings like characters of reference indicate correspondingparts in each figure.

A is any suitable stove, in the fire-box B of which I show suitablysupported my temporary grate C. This grate is constructed so as to besubstantially trough-shaped or concavoconvex in cross-section, therebyobtaining the necessary depth in order that it may hold a suitableamount of combustible material. The said grate is provided with aplurality of holes or slots D, which may be placed in any suitableposition, and by. means of same it it will be understood by followingout the arrows in Fig. 1 that the necessary draft for the fire will passup through the grate and combustible material supported thereon. Inorder to stiffen or brace said grate, I stamp upward-[from the underside of same a plurality of ribs E, which extend from side to side ofthe gratethat is to say, these ribs follow the concavo-convexconfiguration given to the grate.

It Will of course be understood that by reason of the heating of thegrate and consequent cooling of same when it is out of use the materialof said grate is subjected to extreme changes in temperature, and it isone of my chief objects to prevent warping of same through the action ofthese different temperatures, thus increasing its life and maintainingits original shape. By forming or stamping the ribs E so that theirupper side will be on the upper side of the grate I form pockets 0 insaid ribs in which a quantity of air will collect. As the cool airpasses from the exterior into the stove in the usual manner andcontinues through the fire-box by passing through the holes or slots insaid grate, it will be understood that a continuous supply of fresh airis brought'in contact with said grate, thus replenishing the supply ofair in the pockets 0. This air in said pockets being more or less cooland certainly of a lower temperature than the air on the upper side ofsaid grate will kee the temperature of said ribs below that o the restof the grate, thus enabling them to perform their function of stiffeningand bracing the grate. It will of course be understood by one skilled inthis art that by the very act of forming the ribs E the metal therein ismore or less crystallized, and thus made harder than the surroundingmetal in the grate. Thus providing hardened ribs in said grate enablesme to strengthen same thereby, and thus keep its original shapenotwithstanding the action of different temperatures, as said ribs beingmade of metal harder than the surrounding metal it will require a highertemperature to injuriously aflect them than is required to injuriouslyaffect the rest of the grate. Therefore it will be understood that I donot essentially construct the ribs so that they will be provided withthe pockets 0.

By any suitable means the grate C is supported in the fire-box and anysuitable distance above the grates F therein. My preferredformofconstruction for this purpose is to integrally provide said grate withside flanges G, which rest upon the front and rear walls H and I of thefire-box. I

According to the construction shown, A is a coal-stove. By taking offthe lids (not shown) or opening the front door J the grate C is slid inplace and a temporary fire, either of shavings, charcoal, peat, or lightwood, may be madethereon, thus rendering it un necessary to light a bigfire in the stove in order to do a little cooking. From Fig. 1 it willbeseen that by means of my grate the fire is brought close to the bottomof the pot or other utensil that may be on the stove. When a temporaryfire is built in a coal-stove or even in a wood-stove, it is so farbelow the bottom of the utensil suspended over same that it ispractically of very little use, asthe greater partof the relativelysmall quantity of heat escapes through the draft-passages, very littlecoming in contact with the utensil, thus requiring a much larger fire tobe made in the stove in order to obtain the result I obtain with a smalltemporary fire made on my grate.

With my grate the minimum amount of combustible material can be used inorder to obtain the maximum heat, thuspreventing the kitchen frombecoming too warm.

What; I claim as my invention is- 1. A temporary grate comprising a member formed or stamped out of sheet metal so as to 'be given asubstantially Concavo-convex-shape or form and providedwith a pluralityof slots or holes to permit of the necessary draft and further providedwith strengthening or bracing ribs stamped upward therein from the lowerside and extending from side to side of said grateand in conformity withits shape, and means whereby same is held in applied position.

2. A temporary grate comprising a member formed or stamped out of sheetmetal so as to be given a substantially concavo-con- Vex shape or formand provided with a plurality of slots or holes to permitof the necessary draft and further provided with strengthening or bracing ribsstamped upward therein from the lower side and extending from side tosideof said grate and in conformity withits shape, the construction ofsaid ribs forming pockets on their under sides, and side flangesintegrally formed from said grate whereby ity is held in appliedposition.

Intestimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

, THOMAS BENNETT.

Witnesses: I i

EGERTON R- CASE,' F. MoDERMoTT.

